Insecticidal preparation



Patented Dec. 17, 1935 I I I I UNITED STATES PATENT OFFICE.

INSECTICIDAL PREPARATION Herbert Schotte and Karl Giirnitz, Berlin, Germany, assignors to Schering-Kahlbaum A. G.,

Berlin, Germany No Drawing. Application December 12, 1933,

igsrilal No. 702,025. In Germany November 13,

6 Claims. (01. 167-24) Our invention refers to insecticidal substances, A ground mixture of 2.5 parts radix dermore especially such as are contained in vegeridis ellipticae, 7.5 parts semen sabadilke and 90 table drugs exerting an insecticidal action. It parts talcum. proved useful in exterminating has particular reference to insecticides containgrasshoppers (for instance tachycines m ing rotenon C23H220s or the like; and it is one of morus) flea. beetles, bugs (lygus campestris) and the objects of this invention to provide insectimany kinds of caterpillars, Instead of the drugs cides containing rotenon which are more eflicient themselves we may also use their eifective ex-- than similar products hitherto used. I tracts or the alkaloids recovered therefrom, for

As is well known to those skilledin the art, instance by mixing 2% .rotenon, 3% veratrin insecticides prepared from the roots of plants and 99.5% kaolin. m belonging to the genus derris, lonchocarpus and In viewof the lower price of semen sabadill's others and containing rotenon or the like are we have found it recommendable to use mixtures particularly efiicient, but the high price of these containing more semen sabadillae than derris drugs has proven to be prohibitive as regards their root. I

use on a largescale. Various changes may be made in the "details .1

We have now found that by combining one of disclosed in the foregoing specification without these drugs containingrotenon with a drug condeparting from the invention or sacrificing the taining veratrin C31H53O11N, for instance sabaadvantages thereof. dilla seed or an extract or alkaloids recovered In the claims afllxed to this specification no from such products, an insecticidal effect is obselection of any particular modification of the tained, which is far greater than the effects invention is intended to the exclusion of other exerted by the two drugs if used singly. modifications thereof and the right to subse- That this is true, is shown by the following quently make claim to any modification not comparative tests made by using strewable covered by these claims is expressly reserved. preparations consisting of intimate ground mix- We claim:

tures of semen ,sabadillae with talc, radix derridis -1. An insecticidal preparation consisting of a elippticae with talc and with a mixture of semen mixture containing rotenon and veratrin.

I sabadilla: and radix derridis ellipticai. In each 2. An insecticidal preparation consisting of a test 30 caterpillars of tephroclystia absinthieta mixture containing drugs containing rotenon and 30 Cl. (geometridae) place on blotting paper were veratrin.

dusted in with a quantity of one of the mixtures 3. An insecticidal preparation consisting of a corresponding to .16 milligram per square centimixture containing extracts of drugs containing metre, the powder being evenly distributed. rotenon and veratrin. I .4. An insecticidal preparation consisting of a 3 D Number or mixture containing rotenon, veratrin and a Preparation 35 3;? fln 5. An insecticidal preparation consisting of a.- mixture containing radix derridis elliptic: and

40 gfifiiifli rifi iotii jji v 13 33 semen sabadi11w- 40 gg giz gg gsg g g gi i; 6. An insecticidal preparatigglfonsinsfdgilsg of a increase: it 33%;???1322: iizg sigadmgf Control test. 0 a0 HERBERT scno'rm. 45

KARL eonnrrz. 

